import type { MouseEvent } from 'react';
import { useParams, Link } from 'react-router-dom';
import type { SessionSummary } from '../../types';
import { formatRelativeTime } from '../../util/time';

interface SessionCardProps {
  session: SessionSummary;
  onDelete: (session: SessionSummary) => void;
  deleting: boolean;
}

export function SessionCard({ session, onDelete, deleting }: SessionCardProps) {
  const { sessionId } = useParams<{ sessionId: string }>();
  const selected = sessionId === session.sessionId;
  const workspaceLabel = session.workDir
    ? session.workDir.split('/').slice(-2).join('/')
    : '(no workspace)';
  const shortId = session.sessionId.replace(/^session_/, '').slice(0, 10);
  const title = session.title;
  const subagentCount = Math.max(0, session.agentCount - 1);

  function handleDeleteClick(e: MouseEvent<HTMLButtonElement>) {
    e.preventDefault();
    e.stopPropagation();
    onDelete(session);
  }

  return (
    <div
      className={[
        'group relative border-b border-border transition-colors',
        selected ? 'bg-surface-2' : 'hover:bg-surface-1',
      ].join(' ')}
    >
      {selected ? (
        <span className="absolute inset-y-0 left-0 w-[2px] bg-[var(--color-cat-conversation)]" />
      ) : null}
      <Link to={`/sessions/${session.sessionId}`} className="block px-3 py-2 pr-10">
        <div className="flex items-center justify-between gap-2">
          <div className="flex min-w-0 items-center gap-2">
            <span
              className="inline-block h-[7px] w-[7px] shrink-0 rounded-full"
              style={{ backgroundColor: session.imported ? 'var(--color-cat-subagent)' : 'var(--color-fg-3)' }}
            />
            <span className="shrink-0 font-mono text-[12px] text-fg-0">{shortId}</span>
            {session.imported ? (
              <span
                className="shrink-0 border px-1 py-0 font-mono text-[9px] uppercase tracking-[0.08em]"
                style={{ borderColor: 'var(--color-cat-subagent)', color: 'var(--color-cat-subagent)' }}
                title={
                  session.importMeta?.originalName
                    ? `imported from ${session.importMeta.originalName}`
                    : 'imported debug bundle'
                }
              >
                imported
              </span>
            ) : null}
          </div>
          <span className="shrink-0 font-mono text-[10.5px] text-fg-3 tabular">
            {formatRelativeTime(session.updatedAt)}
          </span>
        </div>
        <div className="mt-1 flex items-center gap-3 font-mono text-[10.5px] text-fg-2">
          <span className="truncate" title={session.workDir ?? ''}>
            {workspaceLabel}
          </span>
          <span className="tabular text-fg-3">
            {session.mainWireRecordCount}ev
          </span>
          {subagentCount > 0 ? (
            <span className="tabular text-[var(--color-cat-subagent)]">
              {subagentCount}sub
            </span>
          ) : null}
          {session.imported && session.importMeta?.manifest?.kimiCodeVersion ? (
            <span className="tabular text-fg-3" title="kimi-code version that produced this bundle">
              v{session.importMeta.manifest.kimiCodeVersion}
            </span>
          ) : null}
          {session.health !== 'ok' ? (
            <span className="tabular text-[var(--color-sev-error)]">
              {session.health}
            </span>
          ) : null}
        </div>
        {title ? (
          <div className="mt-1 truncate font-mono text-[11px] text-fg-1" title={title}>
            {title}
          </div>
        ) : null}
        {session.lastPrompt ? (
          <div className="mt-1 truncate font-mono text-[10.5px] text-fg-3" title={session.lastPrompt}>
            prompt · {session.lastPrompt}
          </div>
        ) : null}
      </Link>
      <button
        type="button"
        onClick={handleDeleteClick}
        disabled={deleting}
        className="absolute right-2 top-2 flex h-5 w-5 items-center justify-center border border-transparent text-fg-3 transition-colors hover:border-[var(--color-sev-error)] hover:text-[var(--color-sev-error)] disabled:cursor-not-allowed disabled:opacity-40"
        title={`Delete session ${session.sessionId}`}
        aria-label={`Delete session ${session.sessionId}`}
      >
        <TrashIcon />
      </button>
    </div>
  );
}

function TrashIcon() {
  return (
    <svg width="11" height="11" viewBox="0 0 12 12" aria-hidden="true">
      <path d="M2 3 H10" stroke="currentColor" strokeWidth="1.2" strokeLinecap="square" />
      <path d="M4 3 V2 H8 V3" stroke="currentColor" strokeWidth="1.2" fill="none" />
      <path d="M3 4 H9 L8.5 10 H3.5 Z" stroke="currentColor" strokeWidth="1.2" fill="none" />
    </svg>
  );
}